package com.ailanyin.modules.system.service.impl;

import com.ailanyin.common.base.exception.Assert;
import com.ailanyin.common.redis.constants.CacheConstant;
import com.ailanyin.common.redis.service.RedisService;
import com.ailanyin.modules.system.domain.SysDictData;
import com.ailanyin.modules.system.domain.SysDictType;
import com.ailanyin.modules.system.mapper.SysDictDataMapper;
import com.ailanyin.modules.system.mapper.SysDictTypeMapper;
import com.ailanyin.modules.system.service.ISysDictTypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 字典类型
 *
 * @author ailanyin
 */
@Service
public class SysDictTypeServiceImpl implements ISysDictTypeService {

    @Autowired
    private RedisService redisService;

    @Resource
    private SysDictTypeMapper dictTypeMapper;
    @Resource
    private SysDictDataMapper dictDataMapper;


    /**
     * 项目启动时，初始化字典到缓存
     */
    @PostConstruct
    public void init() {
        loadingDictCache();
    }

    /**
     * 根据条件分页查询字典类型
     *
     * @param dictType 字典类型信息
     * @return 字典类型集合信息
     */
    @Override
    public List<SysDictType> selectDictTypeList(SysDictType dictType) {
        return dictTypeMapper.selectDictTypeList(dictType);
    }

    /**
     * 根据所有字典类型
     *
     * @return 字典类型集合信息
     */
    @Override
    public List<SysDictType> selectDictTypeAll() {
        return dictTypeMapper.selectDictTypeAll();
    }


    /**
     * 根据字典类型ID查询信息
     *
     * @param dictId 字典类型ID
     * @return 字典类型
     */
    @Override
    public SysDictType selectDictTypeById(Long dictId) {
        return dictTypeMapper.selectDictTypeById(dictId);
    }

    /**
     * 根据字典类型查询信息
     *
     * @param dictType 字典类型
     * @return 字典类型
     */
    @Override
    public SysDictType selectDictTypeByType(String dictType) {
        return dictTypeMapper.selectDictTypeByType(dictType);
    }

    /**
     * 批量删除字典类型信息
     *
     * @param dictIds 需要删除的字典ID
     */
    @Override
    public void deleteDictTypeByIds(List<Long> dictIds) {
        for (Long dictId : dictIds) {
            SysDictType dictType = selectDictTypeById(dictId);
            if (dictDataMapper.countDictDataByType(dictType.getDictType()) > 0) {
                Assert.fail(String.format("%1$s已分配,不能删除" , dictType.getDictName()));
            }
            dictTypeMapper.deleteDictTypeById(dictId);
            redisService.del(CacheConstant.SYS_DICT_KEY + dictType.getDictType());
        }
    }

    /**
     * 加载字典缓存数据
     */
    @Override
    public void loadingDictCache() {
        Map<String, List<SysDictData>> dictDataMap = dictDataMapper.selectDictDataList(new SysDictData()).stream().collect(Collectors.groupingBy(SysDictData::getDictType));
        for (Map.Entry<String, List<SysDictData>> entry : dictDataMap.entrySet()) {
            redisService.set(CacheConstant.SYS_DICT_KEY + entry.getKey(), entry.getValue().stream().sorted(Comparator.comparing(SysDictData::getDictSort)).collect(Collectors.toList()));
        }
    }

    /**
     * 清空字典缓存数据
     */
    @Override
    public void clearDictCache() {
        redisService.del(redisService.getKeys(CacheConstant.SYS_DICT_KEY + "*"));
    }

    /**
     * 重置字典缓存数据
     */
    @Override
    public void resetDictCache() {
        clearDictCache();
        loadingDictCache();
    }

    /**
     * 新增保存字典类型信息
     *
     * @param dict 字典类型信息
     * @return 结果
     */
    @Override
    public int insertDictType(SysDictType dict) {
        checkDictTypeUnique(dict);
        return dictTypeMapper.insertDictType(dict);
    }

    /**
     * 修改保存字典类型信息
     *
     * @param dict 字典类型信息
     * @return 结果
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public int updateDictType(SysDictType dict) {
        checkDictTypeUnique(dict);
        SysDictType oldDict = dictTypeMapper.selectDictTypeById(dict.getDictId());
        dictDataMapper.updateDictDataType(oldDict.getDictType(), dict.getDictType());
        int row = dictTypeMapper.updateDictType(dict);
        if (row > 0) {
            List<SysDictData> dictDataList = dictDataMapper.selectDictDataByType(dict.getDictType());
            redisService.set(CacheConstant.SYS_DICT_KEY + dict.getDictType(), dictDataList);
        }
        return row;
    }

    /**
     * 校验字典类型称是否唯一
     *
     * @param dict 字典类型
     */
    private void checkDictTypeUnique(SysDictType dict) {
        if (dictTypeMapper.checkDictTypeUnique(dict) > 0) {
            Assert.fail("字典类型" + dict.getDictType() + "已存在!");
        }

    }
}
